20842605

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{521}}^1$

素因数の和:666

約数の個数: 48

約数和(自身を含む): 41693184

約数和(自身を除く): 20850579

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 127, 315, 381, 521, 635, 889, 1143, 1563, 1905, 2605, 2667, 3647, 4445, 4689, 5715, 7815, 8001, 10941, 13335, 18235, 23445, 32823, 40005, 54705, 66167, 164115, 198501, 330835, 463169, 595503, 992505, 1389507, 2315845, 2977515, 4168521, 6947535, 20842605]

約数ペア:

[(1, 20842605), (3, 6947535), (5, 4168521), (7, 2977515), (9, 2315845), (15, 1389507), (21, 992505), (35, 595503), (45, 463169), (63, 330835), (105, 198501), (127, 164115), (315, 66167), (381, 54705), (521, 40005), (635, 32823), (889, 23445), (1143, 18235), (1563, 13335), (1905, 10941), (2605, 8001), (2667, 7815), (3647, 5715), (4445, 4689)]